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All results from a given calculation for Si2H6 (disilane)

using model chemistry: B2PLYP=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3D 1A1g
Energy calculated at B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-579.171044
Energy at 298.15K-579.176888
HF Energy-579.127036
Nuclear repulsion energy89.760792
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B2PLYP=FULL/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1g 2201 2095 0.00      
2 A1g 904 860 0.00      
3 A1g 402 382 0.00      
4 A1u 140 133 0.00      
5 A2u 2191 2086 125.82      
6 A2u 839 799 499.28      
7 Eg 2205 2099 0.00      
7 Eg 2205 2099 0.00      
8 Eg 946 901 0.00      
8 Eg 946 901 0.00      
9 Eg 636 606 0.00      
9 Eg 636 606 0.00      
10 Eu 2215 2108 203.00      
10 Eu 2215 2108 202.98      
11 Eu 956 910 93.88      
11 Eu 956 910 93.88      
12 Eu 393 374 22.93      
12 Eu 393 374 22.93      

Unscaled Zero Point Vibrational Energy (zpe) 10689.2 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 10176.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B2PLYP=FULL/3-21G
ABC
1.41107 0.16485 0.16485

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is D3d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 1.186
Si2 0.000 0.000 -1.186
H3 0.000 1.406 1.702
H4 -1.217 -0.703 1.702
H5 1.217 -0.703 1.702
H6 0.000 -1.406 -1.702
H7 -1.217 0.703 -1.702
H8 1.217 0.703 -1.702

Atom - Atom Distances (Å)
  Si1 Si2 H3 H4 H5 H6 H7 H8
Si12.37281.49731.49731.49733.21263.21263.2126
Si22.37283.21263.21263.21261.49731.49731.4973
H31.49733.21262.43452.43454.41533.68343.6834
H41.49733.21262.43452.43453.68343.68344.4153
H51.49733.21262.43452.43453.68344.41533.6834
H63.21261.49734.41533.68343.68342.43452.4345
H73.21261.49733.68343.68344.41532.43452.4345
H83.21261.49733.68344.41533.68342.43452.4345

picture of disilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 Si2 H6 110.156 Si1 Si2 H7 110.156
Si1 Si2 H8 110.156 Si2 Si1 H3 110.156
Si2 Si1 H4 110.156 Si2 Si1 H5 110.156
H3 Si1 H4 108.778 H3 Si1 H5 108.778
H4 Si1 H5 108.777 H6 Si2 H7 108.778
H6 Si2 H8 108.778 H7 Si2 H8 108.777
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability